[FFmpeg-user] The parameter of bit_rate in video encoding does not work
james.darnley at gmail.com
Thu Nov 14 13:13:13 CET 2013
On 2013-11-14 08:41, Li wrote:
Does this contain the value you expect? I mean does it contain 7974000
(or something close) that you say is the input bitrate.
> The file is too big for me.
What are the other encoding settings you are using? Last I knew,
ffmpeg's defaults were bad. If you tried to use libx264 as the encoder
it should spit an error message at you.
> If I use the ffmpeg command to do fps processing (actually the original fps
> is 30 too. So this command is only for test purpose):
> ffmpeg -i VID_2013_output.mp4 -r 30 VID_2013_output_fps30.mp4
> The file size is 1.9MB! Bitrate: 584 kbps
> Since the ffmpeg command can achieve the purpose (lower the video encoding
> bit rate), where is wrong with my ffmpeg C++ code?
ffmpeg prints a very useful log when encoding. Where is it? Where is
the log from your code?
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